The proposed working standards, in order of increasing reflectivity, are diamond, silicon, tungsten, nickel, and aluminum. All are isotropic, and they cover the range from 17.2 to 83 percent reflectivity. A comparison of the reflectivities of a suite of nine minerals as determined by use of various standards demonstrates the advantages of having a set of standards rather than one or two.

First Page Preview

First page PDF preview
You do not currently have access to this article.